To date, the Department of Homeland Security has not indicated that the ICE agents who stopped Salgado Araujo had any knowledge of drugs possibly being inside the vehicle at the time of the fatal shooting.

The medical examiner ruled that Salgado Araujo's death was caused by a gunshot to the torso, and officials have not released toxicology information describing any substances in his system at the time of death.

The president of the LULAC Adelante PAC, a political group that supports Latino voter participation and candidates, accused federal investigators of trying to  change the public discourse and prejudice a jury in Harris County. 

 It just smells of a smear campaign and a cover-up,  Domingo Garcia said.

The ACLU of Texas, which is working closely with Salgado Araujo's family, said,  The Trump administration lacks credibility to investigate itself, and we should be skeptical of any claims until a full independent investigation is complete. 

CNN has reached out to the Department of Justice for comment on the allegations in the warrant and whether it was unsealed at the request of federal prosecutors.

The Harris County District Attorney's Office told CNN it did not file or execute the warrant. The DA's office was able to access the van, it said, with the permission of the local FBI.

The three men who were in the car with Salgado Araujo, including his brother, Victor Salgado, have been detained since the shooting. All three have secured U Visa certifications that protect them from being immediately deported, according to information from Houston immigration attorney Hugo Balderas Ibarra and the Harris County DA's office. CNN reached out to Ibarra for comment Wednesday afternoon.

Ruby Powers, a Houston-based immigration attorney representing Victor Salgado, told CNN she did not have a comment Wednesday afternoon, adding,  we'll just let the authorities do their investigation.